#include <string>       // std::string
#include <iostream>     // std::cout
#include <sstream>      // std::stringstream


int main () {

  std::stringstream ss;

  ss << 100 << '\n' << 200;
  
  char c;
  while (ss.get(c))
  {
  	std::cout << c;
  }
  return 0;
}